MaxWong

Btw no one is going to help me with my Calculus question :P

Nvm.

~The smartest cookie in the world

Oh. I see. 

Oops.

Yes I am very careless :P

~The smartest cookie in the world

\cfrac is slightly longer than \dfrac

LOL I am a cookie and no cookie is smarter than me. So I am the 'Smartest Cookie in the World' :P

I laughed so hard when Nauseated called himself a R. SOB 

~The smartest cookie in the world

sgn(2.5)

= \(\dfrac{2.5}{|2.5|}\\ = 1\)

               -1 when x< 0

sgn(x) = undefined when x = 0

              1 when x > 0

https://www.desmos.com/calculator/hnpqmpeny5 

A graph of sgn(x).

If you didn't ask this question I wouldn't do research about sgn(x)....... Anyways, Thank you!!

~The smartest cookie in the world

So many dialogues.......

I didn't imagine there were so much funny dialogues in the historical posts.

Maybe I will start searching some of these kind of historical posts! :D

~The smartest cookie in the world

y + x = 12

y = 12 - x

~The smartest cookie in the world

Who is Emily LOL

Btw it IS 2 to the power 4, not -4

y + x = 12

y = 12 - x

~The smartest cookie in the world

Only one equation but 2 variables. Cannot be solved.

~The smartest cookie in the world